题目内容

By the same token, regularly searching the Internet allows you to be the first in line to apply______companies post new job openings.

A. which
B. when
C. that

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根据生成树协议,每个网段会有一个指定端口,这个端口是_____的。除此之外 的该网段上的所有端口都处于阻塞状态

Asking questions also gives you the opportunity to _______ if this is the right place foryou.

A. find in
B. find with
C. find out

请描述生成树协议的工作原理

There are many ___to do so for the participants.

A. thing
B. benefits
C. strive

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